Precision measuring device



Dec. 22, 1953 J. VERDERBER PRECISION MEASURING DEVICE 45 Original FiledJan. l3, l9 3 Sheets-Sheet l INVENTOR JOSEPH VERDERBER ATTORNEYS J.VERDERBER PRECISION MEASURING DEVICE w 9 1 2 2 m D s Sheets-Sheet 2Original Filed Jan. 13, 1945 INVENTOI? JOSEPH VERDERBER ATTORNEYSATTORNEYS J. VERDERBER PRECISION MEASURING DEVICE 5 m NW Dec. 22, 1953Original Filed Jan. 13, 1945 Patented Dec. 22, 1953 Original,application .Ja

nuary 13, 1945, .Scfial No- 572,601, Divided and this application August6 claims.

This invention relates to measuring devices, but has reference moreparticularly "to a precision measuring device of the type described inmy U. S. Patent No. 2,350,432.

This application is a division of my appending application, Serial No.572,601, fiied January '13, 1945, now Patent No. 2,568,524.

A primary object o'fth'e invention is to provide a measuring device ofthe character described of extreme accuracy. 7

Another object of the invention is to provide borers.

Another pact and easily readable. V

A further object oi the invention is to provide a measuring device .ofthe character described,

a measuring device .of the character described,

zero setting. 7

Other objects and advantages of the invention will 'be apparent duringthe course of the following description. I

In the accompanying drawings, .forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same:

Fig. 1 is a top plan view vice;

Fig. 2 is a view, partly in elevation and ,partly in section, of themeasuring device, WithzthECOYGl plate thereof removed;

Fig. 3 is an .end elevation :of

Fig. 4 is a plan ,view .of .the device, with the cover plate thereofremoved, .and showing the location and arrangement of .thegears;

Fig. 5 is a front elevation-a1 view of the device;

Fig. 6 is a. cross-sectional view, showing in a more -or lessdiagrammatic manner the gearing of the device, and

Fig. "-7 is -a 'fragmeiitary "cross-sectional view, taken .on, the-line1-'---'! mi Fig. 6.

of :the measuring de- SeriaLNo-24L300 portion 5,

The lower portion 4 of the casing has a bottom I and walls 8, 9, ilflandii I, j tion 5 of the casing consists of walls i2, i3,

W5 1 825 o m d thereon an 1 standing lug or plate I5a which is adapted.to be attached to the movable work table of a machine tool, such forexampleas ajig borer,

The walls} and ll .stated, may .be a jig arethrust bearings .23 and 24.'A

nal movement. Pins 2.43 ,are .secured to the bed plate of .the machinetool, and-serve as a guide for .oneendef the bar. 7 I

The bar [1 is provided to the screw l. 8,, t opposite sides,

interposed .between the locknut H with the casin 0 that this end of thebar may abut a cor with the pin 3| by means of a screw 33, the functionof which will be presently described.

The spindle 30 has an intermediate reduced portion 30a which extendsthrough a partition and bearing plate 31, which is secured in spacedrelation to the cover plate 2 by means of screws 38 and spacers 39. Thespindle 30, in turn, bears against two pairs of rollers 40, which aremounted on vertically-extending shafts 41, mounted within the casingsection 4 between the bottom 1 thereof and a ledge is paralled with thebottom thereof. The rollers of each pair of rollers are maintained invertically-spaced relation by means of spacer members 43, and thrustbearing washers 44 are interposed between the lower rollers of eachpairand the bottom of the housing section. I

42 of the housing section which The bar I! is maintained in rollingcontact with the spindle 31! by mounted on a vertically-extending shaft43, the ends of which are mounted in a roller carriage 41. The rollercarriage 41 is pivotally secured within the housing section 4 by meansof a pin 48, and the roller 45 is resiliently maintained in engagementwith the bar IT by means of a coil expansion spring 49, which is seatedin a recess 55 in the carriage, one end of the spring bearing againstthe carriage and 'the other end against a thrust element 5|. The thrustelement bears against a set screw 52, wall 8 of the housing section 4,and has a squared end 53 for engagement by a socket wrench when thescrew is to be adjusted for varying the compression of the spring 49.

It is desirable, at times, to release the roller 45 from engagement withthe bar l1, and for this purpose, a screw 54 is provided which ismounted for reciprocal'movement in the wall 8 of the housing section '4,and has its inner end in threaded engagement with carriage 41. Thescrew'has a head 55 which is disposed exteriorly of the wall 8, a thrusthearing washer 51 being interposed between said wall and head. Tofacilitate turning of the screw 54, when the roller 45 is to bewithdrawn from the bar [1, a lever 58 is secured to and extends at rightangles from the head 55 of the screw to form a handle.

' The screw 54 is so connected to the carriage 41, that when the lever58 is in the solid line position shown in Fig. 5, the roller 45 bearswith the proper degree of pressure against the bar ii, and when thelever is in the dotted line position, the pressure of the roller issuficiently relieved to permit free movement of the housing relativelyto the bar.

The movement of the housing l'relatively to the bar i1 is transmittedthrough the roller 45 and spindle 30 to pointers which areassociatedwith a set of dials which are disposed above and secured to the coverplate 2. These dials are designated by reference characters 65, (ii, 62and 53, the dial bearing indicia marks indicating inches, the dial 6itenths of an inch, the dial 52 thousandths of an inch, and the dial 63tenthousandths of an inch.

The aforesaid movement is transmitted to the various pointers in thefollowing manner as will be apparent from Fig. '6 of the drawings.

The movement to the pointer associated with the dial 6!) is transmittedthrough the intermediary of the reduced portion 30a of the spindle 30, apinion, a gear 65, apinion 55, an internal gear 61, and a spindle 68. 'The pinion 64 is splined or otherwise rigidly secured to the which ismounted in the an car on the means of a roller 45, which is 4 r screw86, which is adjustably reduced portion is rigidly secured to the pinion66, and the latter is revolubly mounted on a spindle 69 which is securedto the plate 31. The spindle 5B is supported by means of a bracket 10,which is secured to the cover plate 2 by means of screws H.

The aforesaid movement to the pointer associated with the dial 5! istransmitted through the intermediary of the reduced portion 300:, of thespindle 3B, the pinion 64, the gear 55, a gear 12, pinions "l3 and T4,and a spindle T5. The pinion 15 is revolubly mounted on a spindle T5,the ends of which are-secured in the plates 2 and 31.

The pinion i4 is rigidly secured to the spindle 15, the ends of whichare journalled in the dial ti and the plate 31.

The aforesaid movement to the pointer associated with the dial 62 istransmitted through the intermediary of the reduced portion 30a of thespindle 3B, the pinion 84, a gear Ti, a, pinion I8, and a spindle E9,the ends of which are journalled in the dial 52 and the plate 3?.

The aforesaid movement to the pointer associated with the dial 63 istransmitted through the intermediary of the reduced portion 30a of thespindle 30, the pinion G4, the gear H, the pinion 8, a gear 8'6 which isrigidly secured to the spindle IS, a gear 81, a pinion 82 and a spindle83. The gear (ii is mounted on a spindle 54, the ends of which arejou'rnalled in the plates 2 and 31. The ends of the spindle 83 arejournalled in the dial 53 and plate 37. p

For the purpose of returning the pointers which are associated with thevarious dials to their zero positions, a knurled knob 85 is secured tothe upper reduced end portion 39b of the spindle 30, and when thepointers are to be returned to their zero positions, the roller 45 isfirst withdrawn from engagement with the bar I? in the manner previouslydescribed, thereby relieving the pressure between the bar I! and spindle35 and facilitating turning of the spindle.

The spindle 33 bears at its lower end upon the thrust pin 3 l, and atthe upper end of the reduced portion 3&0; thereof, it bears against athrust mounted in a holder element 8?, which is secured as by a screw 88to the cover plate 2. The screw 58 is provided with a knurled head 25 tofacilitate rotation thereof. The screw 85 has an axial opening thereinthrough which the reduced portion 39b of the spindle 30 extends.

By adjustment of the screw 8.6 and the screw 36, the vertical positionof the spindle 39 may be accurately set, and a desired degree ofpressure on the ends of the spindle provided, to insure free rotation ofthe spindle.

The pin 35 preferably has a slight taper, and the surface Ha of the barI! is "transversely inclined to correspond with this taper. This permitsan accurate adjustment of the frictional pressure between the pin 30 andthe bar H to be made, and insures contact between the pin and bar atsuch time that these are in operative engagement with each other.

The various parts of the device are machined in such a manner as toobtain the highest degree of accuracy. Anti-friction bearings areprovided wherever necessary to insure frictionless rotation of thevarious pins, shafts and other elements.

The use and operation of the device will be readily understood from theforegoing descriptron, but may be briefly described as follows:

of the spindle 30. The gear With the bar i'iattached .to the bed plateorv While the bar 47 has been described as stationary and the housingvas movable, it will be readily understood that these relatively movableelements may be used in reversed relation, that is to say, the housingmay be attached to the bed plate of the machine and the bar I1 to themovable work table.

It will be further understood that the use of the device is notnecessarily confined to machine tools and the like, but that the deviceis readily adapted for use wherever accuracy of measurement between ,vorelatively movable parts is desired.

It is to be understood that the form of my and permit free relativemovement between the bar and housing.

2. In a device of the character described, a housing, a bar movablethrough said housing, a roller in said housing, means resilientlypressing housing, a bar movable through said housing, a roller in saidhousing, means resiliently pressing said roller into engagement withsaid bar, means 4. housing, a bar movable through said housing, a

into engagement with said bar, and means accessible from the exterior ofsaid housing for varying the pressure exerted by said first-named means.

housing, a bar movable through said housing, a

gagement with said bar.

6. In a device of the character described, a housing, a bar movablethrough said housing, a

JOSEPH VERDERBER.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 637,016 Oram Nov. 14, 1899 1,420,612 Vanderveld June 20, 19222,229,629 Anderson Jan. 28, 1941 2,350,432 Verderber June 6, 19442,378,212 Giern et al June 12, 1945

